Fix: cdb_conf table is not accessible to regular users

scripts-available/CDB_AnalysisCheck.sql

@@ -1,3 +1,15 @@
+-- Read configuration parameter analysis_quota_factor, making it
+-- accessible to regular users (which don't have access to cdb_conf)
+CREATE OR REPLACE FUNCTION _CDB_GetConfAnalysisQuotaFactor()
+RETURNS float8 AS
+$$
+BEGIN
+  RETURN CDB_Conf_GetConf('analysis_quota_factor')::text::float8;
+END;
+$$
+LANGUAGE 'plpgsql' STABLE SECURITY DEFINER;
+
+
 -- Get the factor (fraction of the quota) for Camshaft cached analysis tables
 CREATE OR REPLACE FUNCTION _CDB_AnalysisQuotaFactor()
 RETURNS float8 AS
@@ -6,7 +18,7 @@ DECLARE
   factor float8;
 BEGIN
   -- We use a floating point cdb_conf parameter
-  SELECT cdb_conf_getconf::text::float8 INTO factor FROM CDB_Conf_GetConf('analysis_cache_factor');
+  factor := _CDB_GetConfAnalysisQuotaFactor();
   -- With a default value
   IF factor IS NULL THEN
     factor := 0.2;